Locomotive boiler



June 12, 192s. 1,673,152

Y N. M. LOWER LOCOMOTIVE BOILER Patented June 12, 1928.

UNITED STATES PATENT OFFICE.,

NATHAN M. LOWER, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO LOCOMOTIVE ST'OKER COMPANY, A CORPORATION OF PENNSYLVANIA.

LOCOMOTIVE BOILER.

Application filed July 24,

The invent-ion relates to improvements in locomotive boilers of the general character of that shown and broadly claimed in my copending application.

In the manufacture or remodeling of locomotive boilers, a section of the backhead being odset inwardly to provide an opening for the admission of fuel, it is essential that the upper margin of the odset portion be securely closed and that a tight joint be made at the juncture of such offset, and particularly at its upper margin, with the undistorted portion of the backhead.

The present invention has for its object the provision of an adequate closure for the odset section, and a secure and reliable joint between this section and the undistorted portion of the backhead.

The invention consists in a structure such as is hereinafter described and as illustrated in the accompanying drawings, in which Fig. 1 is a detail central, vertical section through the backhead of the boiler;

Fig. 2 is a plan section taken in part on the line 2 2 and in part on the line 2a-2a of Fig. 1; and

Fig. 3 is a view in perspective of the closure element for the upper margin of the inset section of the backhead.

At 10 there is shown a portion of the hollow backhead of a locomotive boiler of ordinary construction and as being provided with the usual hand firing door opening 11 which will as usual be covered by a door (not shown) The inner and outer sheets of the backhead are shown as flanged inwardly at 12, 13 to form the side walls of the opening 11, the two flanges abutting and being welded together.

The inwardly odset section 14 of the backhead is shown as being immediately below the opening 11, though the invention is applicable to boilers in which the odset section is diderently located. The alcove enclosed by the odset portion is upwardly open, providing for the admission of fuel to the fireboX therethrough independently of the handfiring opening.

The outer sheet 15 of the odset section 14 is desirably laterally anged as shown at 16 to overlap the outer sheet 17 of the undistorted portion of the backhead. Preferably also the sheet 17 is flanged inwardly as shown at 18 and lies in contact with the sheet 15. The contacting portions of these two 1926'. Serial No. 124,773.

sheets are suitably secured together as by welding. Y

The inner sheet 19 of the odset section 14- is flanged laterally at its margins as shown at 20-20 to engage the outer surface of the inner sheet 21 lof the baclhead, the contacting portions being securely attached as by welding.

The upper-.margin of the offset section 14 is closed by means of channeleshaped sheet metal element 22, the flanges of which fit snugly between the sheet 15, 19 to which they are preferably welded, and if desired may be further secured by means of rivets or staybolts as 23.

The element 22 is of somewhat greater length than the upper margin of the odset section 14 and is split at its angles, the separated portions of its flanges 24:, 25 and web portion 26 being bent laterally, as may be necessary to bear against the inner surface of the sheets of which the undistorted portion of the backhead is formed, as plainly shown in Fig. 2; and the contacting parts are welded together.

Should the odset section of the boiler wall be located or configured diderently than is illustrated, the closure for its upper margin and the joints at the juncture of the odset section with the undistorted portion of the wall may require modification, but such changes can be readily made by a skilled mechanic.

I claim as my invention:

l. A locomotive boiler comprising a hollow back-head having a hand firing door opening, the portion of such back-head, below such opening being odset inwardly, the upper margin of the odset being closed by an element terminating in the plane of the lower limit of the hand firing opening.

2. A locomotive boiler comprising a hollow back-head having a hand firing door opening, the portion of such baclehead below such opening being odset inwardly, the upper margin of the odset being closed by a channel-shaped element, each end portion of the channel element having a lateral fiange for attachment to the inner face of a wall of the undistorted 'section of 'the back-head.

3. A locomotive boiler comprising a hollow backehead having a hand firing door opening, the portion of such back-head below such opening being odset inwardly, the

upper margin of the offset being closed `by a channel-shaped element, the end portions of the Web and flanges of the channel element beingattached to the inner faces of the Walls of the undistorted section of the back-head.

4L. A locomotive boiler comprising a hollow back-head, a section thereof being inwardly offset, the upper portion of such section being open to provide for the admission of fuel to the fireboX,tl1e upper margin of such offset being closed by an element terminating at the juncture of the offset vith the undistorted portion of the back hea l 5. A locomotive boiler comprisino` a hol- 10W back-head, a section thereof being inwardly offset, the upper portion of such section being open to provide for the admission of fuel to the fireboX, the upper margin of suolioifset being closed by a channelshaped element, each end portion of the channel-element having a lateral flange for undistorted section of the back-head.

7. A locomotive boiler comprising a hollow baclrhead, a section thereof being in- Wardly offset7 the upper portion of such seotion being open to provide for the admission of fuel to the lireboX, the upper margin of such offset being closed by a channel-shaped element attached at its ends to the undistorted portion of the backhead.

' In testimony whereof I affix my signature.

NATHAN M. LOWER. 

